Method for preparing ether-ester-amide block polymers for among other moulding, extruding or spinning uses
US4252920A · kind A · utility
31Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1978 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Aug 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/926
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process for preparing ether-ester-amide block polymers. It consists in the reaction, in the molten state of a dicarboxylic polyamide having COOH end groups with a polyoxyalkylene glycol having hydroxyl end groups in the presence of metallic tetraalkoxide(s) as catalysts. The tetraalkoxide(s) used are of the formula M(OR).sub.4 where M is Zr or Hf and the radicals R, identical or different are linear or branched C.sub.1 -C.sub.24 alkyl radicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.